Sony grand wega tv 50"- approx 3 years old

Picture screen will goblank and the power/standby light will blink 45 times and the picture comes back on for a minute or two and the cycle continues non stop. Any ideas as to what the problem is? Thanks for your assistance.

1. Try this - hold the menu button down for 10 seconds. TV
should power up; you will have to turn off front panel buttons on menu.

2. You can also try plugging in the TV through the USB on its panel to a
computer or USB charger, and it may work. However, this is only a temporary
solution.

3. Powering down the set or putting it in standby may have
allowed the power supply to cool. Weak capacitors often go out of spec when
they cool, thus preventing a section of the power supply from firing up
properly again. There is a simple trick...just warm the back of the TV with a
hair dryer for 5-7 mins after you have unplugged the TV. Look for the little
areas of holes in the back panel of TV. Use these as your guide at where to use
the hairdryer, but don't hold the dryer too close (say 5-6inches away). (Make
sure the dryer is on High heat). If the TV doesn't turn on after you have
heated it up (like it tries to come on but then turns off) you need to unplug
the TV again, this resets it. And repeat those steps till it works. Resetting
the TV after it fails to turn on is the key. Also, just leave the TV on. Don't
turn in off. Since it is LCD, it doesn't take much power...only a few bucks
extra a month for your utility bill.

4. A circuit board may crack about some of the larger
components mounted on it. You can inspect the PCB's for fractures, and then
repair them. It may also be poor soldering that has failed. I would be checking
for these things first.

5. If you want to go in for a long term solution, you can easily replace the
whole power board or just change the faulty capacitors. You will have to open
the back panel and take a look. You can make out which are faulty, because
their caps will be swollen on top. Here's a sample pic (not same model):
Check the specifications of the faulty capacitors, and get the replacements
from your local electronics shop. If you are comfortable with this, you can use
a pair of needle nose pliers to G-E-N-T-L-Y pull out the defunct capacitors.
Once that is done, solder in the new capacitors carefully. If are unsure how to
do this, try to get a friend who knows how to do this kinda stuff do it for
you, or get a qualified technician. Warning: If you do not
have a background in electronics repair, or are inexperienced, get a qualified
technician to do it for you.

REMEMBER there are very dangerous voltages inside a TV
that can KILL. Be sure to work SAFE when dealing with electricity. DISCONNECT
THE POWER BEFORE YOU DO ANYTHING.

Hope that helps...Should you have any further questions, please feel free to
post them here.

P.S. - If you find that the solution/answer I provided led you
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what steps you took, results, etc, and I will try to assist you further as best
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IrishDruidHi,

Just wanted to inquire if your issue is resolved, or if there is anything
further I can do to assist you…

If you find that the solution/answer I provided led you
to, or resulted in a fix, please take a moment to close the ticket with a FixYa!
rating under my solution.I would be very grateful for your show of appreciation.

Should you have any further questions, please feel free to
post them here.

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The picture tube is getting close to failure. Has the picture tube been replaced before? If it hasn't it is probably about due the Vegas were great long lasting T.V. sets but after about 15 years need a new picture tube.

Hi,If you see standby red light blinking on Tv front with 3 seconds interval then count its blinks from pause to pause and let me know, its an error code.And if TV does not even show standby light then check fuse in power supply that would be blew off for some reason, replace it.Still problem? let me know with exact model number of your Sony TV.Thanks.

No solution for you...but I have the same problem. I also had the green blob problem which sony fixed earlier this year. It happens on an intermittent basis. Screen goes off, standby light blinks green, then comes back on. Its off for maybe 1-2 min.

All symptoms in your TV shows that you need to replace its Lamp as it has been consumed its life hours and TV requires new lamp. Lamp can be obtained from Sony Website. Price is $200, Hope this info will help you to enjoy your Sony TV in coming days.

This is usually an indication of a failure in the scan amplifier sections. When the scan amplifiers or high voltage sections fail, the main power supply will usually also require servicing.

It is very common that the fly-back and high voltage multiplier and also the horizontal output stage fails in these sets. Along with it, the power supply will usually require to be serviced. On rare occasions, the vertical deflection amp fails.